#include "lib.h"

int 
strncmp (const char *s1,
      const char *s2,
      size_t n)
{
  if (n == 0)
    return 0;

  while (n-- != 0 && *s1 == *s2)
    {
      if (n == 0 || *s1 == '\0')
      break;
      s1++;
      s2++;
    }

  return (*(unsigned char *) s1) - (*(unsigned char *) s2);
}
